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Mk7 Fiesta ST Cat Back Exhaust - Fully Fitted at mountune HQ

This part does not affect the base vehicle warranty.

The mountune Performance Cat-Back Exhaust reduces back-pressure and improves performance whilst keeping cabin intrusion / boom to a minimum.

A Helmholtz chamber design is utilised in the rear silencer which helps cancel out unwanted frequencies due to the way in which the exhaust gas waves are reflected. Utilising this system, despite being more complicated and expensive to manufacturer, ensures back-pressure remains low, providing the optimum in terms of performance, whilst removing as many of the unwanted frequencies / cabin boom as possible.

The staggered tail-pipe trim adds to the occasion and both trims feature laser-etched 'mountune' logos.

As a mountune Performance product, it's also the only cat-back exhaust available for your Fiesta ST that will not affect the base vehicle warranty and comes with a limited lifetime warranty against manufacturing defects.


  • High-flow cat-back exhaust design improves performance
  • Engineered Helmholtz resonator for a less intrusive, performance sound
  • High quality stainless construction with CNC welds
  • Staggered, twin-tailpipe trims with laser-etched mountune logo
  • Does not affect base vehicle warranty
  • Limited lifetime warranty
  • Includes two additional uprated exhaust isolators

Compatible with all 3-door models globally and EU-only 5-door models.

Customers in the USA please note there is a 5-door specific version, available at www.mountuneusa.com.

Please note: the price shown for this product includes installation* at mountune HQ in Hutton, Essex and is not transferrable to any other Ford dealer or installer.

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you back to confirm this date. If we can't accommodate your preferred choice, the team will discuss with you other available dates, that are still acceptable to you.

*subject to availability. Lead times may vary. Contact us for more information.

Customer Reviews

4.9 Based on 11 Reviews
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Filter Reviews:
    david g.
    United Kingdom United Kingdom

    Good quality products and service

    Had the cat back exhaust fitted at Mountune HQ. Good experience all round, time past quickly in the waiting area. Exhaust looks and sounds great. All work done clearly explained. Very happy with everything.

    david goodwin verified customer review of Mk7 Fiesta ST Cat Back Exhaust - Fully Fitted at mountune HQdavid goodwin verified customer review of Mk7 Fiesta ST Cat Back Exhaust - Fully Fitted at mountune HQ

    Cat-Back Exhaust 5-Star

    5 star product and 5 star service!! This is the second time I have been back to mountune after getting the 215 upgrade for my fiesta st (which I highly recommend) and now with the added cat back exhaust it tops it off - how the car should have left the factory! Brilliant noise without being intrusive in the cabin! HIGHLY RECOMMEND!

    Adam .

    Cat back exhaust

    First time at Mountune HQ and was a great experience everyone is so friendly and well looked after by Ryan. Exhaust sounds awesome wish I’d done it along time ago great addition to go alongside the MP215 that I already had on the car. I shall be back soon I reckon for more upgrades!!!